package com.zhang.hadoop.netty.netty.codec.codec1;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @author: zhang yufei
 * @create: 2022-01-16 16:26
 * @description:
 **/
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    //当通道就绪就会触发该方法
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        //发送一个Student对象到服务器
        StudentPOJO.Student student=StudentPOJO.Student.newBuilder().setId(4).setName("豹子头 林冲").build();
        ctx.writeAndFlush(student);
    }

    //当通道有读取事件时，会出伏
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf= (ByteBuf) msg;
        System.out.println("服务器回复的消息："+buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址："+ctx.channel().remoteAddress());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();

    }
}
